Cooling of pistons.



R. SCHLAEPEER.

COOLING 0F PiSONS.

A APPLICATIQN FILED sPT.21,1s14.

5 nu@ nto/L 4Patented May 28,1918.

' STATES PATENT "oFFicE.

EOBEBT SCHLAEPFERfOF WINTERTHUR, SWITZERLAND, ASSIGNOR T BUSG-SULZEB BBOSDIESEL ENGINE COMQANY, OF ST. LOUIS, MISSOURI, 'A CORPORATION 0F "IISSOUB'L COOLING 0F PISTONS.

Specification of Letters Patent.

Patented May 28, 1918.

Application led September 21, 1914. Serial No. 862,830.

lating to the Cooling of Pistons.

' The improvements relate to piston-cooling apparatus of the kind. wherein a tube or tubes secured to the hollow piston are connected telescopically with a source of water supply and exit and more especially to that particular type of piston-cooling apparatus wherein, moderate water pressures are used,

and air mixed with the water or liquid passes A through the telescopic tubes and pistons.

The object of the invention is to return the water accumulating on the telescopic tubes to the water supply and thereby pro'- vide against the admixture of the same with the oil in the crank-case of the engine.

In the accompanying drawing an exemplary embodiment of the invention is illustrated in diagrammatic manner.

The piston indicated by 1 may be assumed to be the piston of an internal combustion engine or like reciprocating member requiring to be maintained at a predetermined temperature.A The water supply and exit apparatus comprises two chambers marked 2 and 3, respectively, connected together by the common -outiiow-y pipe 4. Thetelescopic tubes and 6, connected to the interior'fc'ooling space 1 of the piston, are arranged to reciprocate telescopically within the upper portions of the chambers 2 and 3, and may be made to t more or less snugly therein by means of the packing ri is introduced into 'thetu e 5 by means of a small pipe 8, which directs a giet of water lengthwise through the tube and into the chamber 1, and such jet carries air with it tube 6 into the outlet chamber 3. The water also runs back through the tube 5. The air is drawn into the supply receptacle 3 through an air inlet 9 in the receptacle 2, and escapes through the outlet in the other receptacle. Water particles adhering to the tubes 5 and 6 are caught in the chambers 11 disposed above the rings 7 and around the lower. portions ofthe tubes, where they enter the-chambers and such water accumulating in these chambers lows back to the receptacles 2 and 3, respectively, through the drain pipes 12.

It will be understood, as above stated, that the illustrative apparatus above described is merely schematic and that the principle thereof can be incorporated in various forms of structures.

Claims:

1. In apparatus of the kind described, awater-supply apparatus, a reciprocating piston having a sliding joint with such appa-- ratus, a chamber above the joint and surrounding the reciprocating part thereof and a drainage passage from such chamber to the water-supply apparatus.

2. In apparatus of the kind described, the combination of a piston having a cooling chamber, a reciprocating tube connected to the piston, a stationary casing wherein said tube reciprocates, a joint between the outside rof the tube and the casing, a catch-basin above the tube, and a drainage paage from such chamber.

In testimony whereof, I have signed this s marked 7. Water specification in the presence of two witnesses.

ROBERT SCHLAEPFER.

Witnesses:

CARL Gunnar, Amen-r Kom 

